On Isis and Osiris: A theological and religious work with philosophical implications. Myths and mysteries of Isis. Elements of Egyptian religion.

On the E at Delphi: One of the three Pythian dialogues of Plutarch. Its subject is the offering that held prominence beside the god, along with the famous sayings 'know thyself' and 'nothing in excess', the E, which appears on coins from Delphi of the Roman era.

The biographer and philosopher Plutarch (circa 50-120 AD) was born in Chaeronea, Boiotia. Through his travels, he broadened his intellectual horizons and engaged with prominent figures of his time, primarily notable Romans. He lived most of his life in his homeland and held public priestly positions.

His surviving work is distinguished in the historical-biographical part and the so-called 'Ethical' writings. In the 'Parallel Lives', prominent Greeks and Romans are compared, and the worlds each represents are indirectly contrasted.

The 'Ethical' writings develop issues of ethics, philosophy, science, politics, literary criticism, as well as themes from religion, nature, history, etc., sometimes in the form of dialogues and other times as treatises or dissertations.

Erudite and with a refined spirit, the author expressed traditional Greek values with simplicity and an optimistic perspective. His work delights and teaches, while also being an important source of the literature of classical and Alexandrian times.

[Excerpt from the publisher or edition presentation text]